What the heck is going on with my RABS?

[f-two-fiddy]

For the past couple of days if I brake fairly hard, my ABS light comes on, and the rear brakes drag after I release the brake pedal. It also seems like the rear brakes are not working. I can feel the fronts working hard, but the rears not doing their job.

 

[icanfixall]

Get under the truck and self adjust the rears. Those slef adjusters really never have worked properly for many owners here. I adjust as park of my under the truck pm work. If the parking brake peddle sets close to the floor then the rears are way out of adjustment. Then the fronts do al the stopping and they are not designed for that. They get hot quick. Then they warp or crack the totors. Happened to me a few times till I found out that issue. A balanced braking truck is a pleasure to drive and stop.

 

[Black dawg]

those are fairly common symptoms of a failed rabs control valve.

 

[f-two-fiddy]

Yeah, kinda what I figured. I do adjusty the rear brakes by hand every 10-15K.

What are my options? Can I gut the RABS valve? I'd imagine that a new valve is not cheap?

 

[OLDBULL8]

Try this: Take the plug out on the side, a small amount ofbrake fluid will come out, remove the spring there but leave the piston in, put plug back in, don't drive, now cycle the brakes 5-6 times slowly, replace spring, check brake fluid level. Take a drive, see if it done any good. No change, then maybe the sensor is going bad, or sensor wires are shorting/grounding.

Use that new camera, want pic's.

 

[f-two-fiddy]

I've got a 300mile roadie tomarrow. I'll have to give that a try this weekend.

 

[OLDBULL8]

I see now you have an 85, RABS checkout is for an 89 but can't be too far off, look at all 4 pic's.
Could be just metal chips on sensor. Low brake fluid. My Brain is a little slow tonight.

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